class method self.find_one

# File activerecord/lib/active_record/base.rb, line 1610
        def find_one(id, options)
          conditions = " AND (#{sanitize_sql(options[:conditions])})" if options[:conditions]
          options.update :conditions => "#{quoted_table_name}.#{connection.quote_column_name(primary_key)} = #{quote_value(id,columns_hash[primary_key])}#{conditions}"

          # Use find_every(options).first since the primary key condition
          # already ensures we have a single record. Using find_initial adds
          # a superfluous :limit => 1.
          if result = find_every(options).first
            result
          else
            raise RecordNotFound, "Couldn't find #{name} with ID=#{id}#{conditions}"
          end
        end